US4297523A - Gas pipe cable - Google Patents

Gas pipe cable Download PDF

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Publication number
US4297523A
US4297523A US06/152,148 US15214880A US4297523A US 4297523 A US4297523 A US 4297523A US 15214880 A US15214880 A US 15214880A US 4297523 A US4297523 A US 4297523A
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US
United States
Prior art keywords
supporting
longitudinal axis
slide bearing
phase
insulator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/152,148
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English (en)
Inventor
Carl D. Floessel
Klaus Floessel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Assigned to BBC BROWN, BOVERI & COMPANY, LIMITED, A CORP. OF SWITZERLAND reassignment BBC BROWN, BOVERI & COMPANY, LIMITED, A CORP. OF SWITZERLAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FLOESSEL CARL D., FLOESSEL KLAUS
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/066—Devices for maintaining distance between conductor and enclosure
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/002—Joints between bus-bars for compensating thermal expansion

Definitions

  • the present invention relates to gas pipe cables, and more particularly to a three phase gas pipe cable having three phase conductors arranged in an enclosing pipe and supported therein by supporting insulators.
  • phase conductors are arranged within a common enclosing pipe.
  • the phase conductors are arranged in a triangular configuration, and are each held on ring supports by supporting insulators.
  • two supports are provided at each supporting location of each phase conductor.
  • the longitundinal axes of the two supports intersect at an angle.
  • Each axis is positioned with respect to the axes of the supports of the other phase conductors such that when the gas pipe cable is viewed in cross-section, the axis of each supporting insulator passes substantially through the centers of two phase conductors.
  • electrodynamic current forces occurring between the phase conductors particularly in the case of a short circuit, may be controlled with little effort.
  • such conventional gas pipe cables are subject to detrimental mechanical effects caused by differential heating of the phase conductors.
  • phase conductors are supported by supporting devices arranged periodically in the enclosing pipe.
  • the phase conductors undergo differential linear expansion.
  • the differential linear expansion applies nonuniform shear stresses or torques to the supporting devices. Therefore, the supporting devices must be solidly anchored to the enclosing pipe using special methods which are cumbersome, labor intensive and costly. If such special methods are not employed, however, the differential linear expansion of the phase conductors may cause the supporting devices to overturn.
  • a gas pipe cable includes phase conductors which are supported in an enclosing pipe in such a manner that each phase conductor is individually dilatable. As such, when the phase conductors are exposed to differential heating, each phase conductor is free to individually expand in the axial or longitudinal direction. Consequently, the supporting insulators cannot be stressed to overturning.
  • a single thermal expansion compensator is sufficient for each phase conductor in each section of the gas pipe cable.
  • a gas pipe cable includes shielding electrodes which permit relatively uniform fields to exist between the phase conductors and the enclosing pipe even though the phase conductors may each be in relatively different positions with respect to their supporting insulators and associated apparatus as a result of differential thermal expansion.
  • FIG. 1 is a transverse cross-sectional view of a gas pipe cable according to the present invention in which a phase conductor supported by two supporting insulators is illustrated;
  • FIG. 2a is a cross-sectional view of a foot of a supporting insulator according to one embodiment of the present invention.
  • FIG. 2b is a cross-sectional view of a foot of a supporting insulator according to another embodiment of the present invention.
  • FIG. 3a is an axial sectional view of a gas pipe cable section through the lines 3a--3a and viewed in the directions of the arrows of FIG. 3b;
  • FIG. 3b is a longitudinal cross-sectional view of a gas pipe cable section according to the present invention.
  • a gas pipe cable includes a phase conductor 4a supported at each of two supporting locations 4 by a supporting insulator 1.
  • Each supporting insulator 1 is fixedly connected to the phase conductor 4a at the support points 4 of the phase conductor by an inlet fitting 1b included at the end of the supporting insulator facing the phase conductor 4a.
  • the inlet fitting includes a threaded lug 1c which threadedly engages a threaded piece 4d included on the phase conductor 4a.
  • the threaded piece 4d includes two threaded holes which receive the threaded lugs 1c associated with each of the supporting insulators 1 supporting the phase conductor 4a.
  • a washer 9 is included between each supporting insulator 1 and the phase conductor 4a.
  • the longitudinal axes of the supporting insulators 1 intersect substantially at the center of the phase conductor 4a.
  • An angle of intersection is included between the axes of the supporting insulators.
  • the angle of intersection between the longitudinal axes of the supporting insulators associated with phase conductor 4a, and the angles of intersection between the supporting insulators associated with phase conductors 4b and 4c (FIG. 3b) are equal in magnitude.
  • Each supporting insulator 1 includes a foot 1a which accommodates an inlet fitting 1d.
  • Each supporting insulator 1 includes a shielding electrode 7 at the foot 1a.
  • the inlet fitting 1d connects the supporting insulator 1 to a slide bearing 2.
  • a sliding bolt 2c of the slide bearing 2 is connected by a coupling nut 11 to the foot 1a of the insulator.
  • a fastening device 11a such as a lock washer, is included.
  • an intermediate piece 10 is included between the sliding bolt 2c and the inlet fitting 1d.
  • the sliding bolt 2c is accommodated in a groove 2b included in a slide bearing block 2a in a bearing-like manner.
  • the groove 2b is substantially parallel to the longitudinal axis of the phase conductor 4a, and is substantially parallel to the longitudinal axis of an enclosing pipe 3. So accommodated, the sliding bolt 2c is capable of slide motion in the direction of the longitudinal axis of the enclosing pipe 3, and of the phase conductors 4a, 4b and 4c.
  • the slide bearing block 2a is fastened to the enclosing pipe 3.
  • the slide bearing block includes a bearing block foot 2h which accommodates a lock nut 12.
  • the lock nut 12 is fastened to an arcuate sheet metal part 8 welded to the enclosing pipe 3.
  • the slide bearing block 2a may be directly welded to the arcuate sheet metal part 8 and to the enclosing pipe 3.
  • the arcuate sheet metal part 8 spatially separates the two slide bearing blocks 2a associated with a particular phase conductor from each other.
  • phase conductors When differential heating of the phase conductors occurs in a gas pipe cable according to the present invention, such as that which may occur between phase conductors located at the top and at the bottom of an underground or buried three phase gas pipe cable, the corresponding differential linear expansion of the phase conductors will not stress the gas pipe cable according to the present invention to failure.
  • the slide bearings 2 allow each phase conductor 4a, 4b and 4c to freely expand in the axial direction by permitting each supporting insulator 1 rigidly connected to a phase conductor to freely slide in the axial direction in response to the linear expansion of that phase conductor.
  • the slide bearing blocks associated with each phase conductor may be located at relatively different locations in the enclosing pipe 3 with respect to the slide bearing blocks associated with each of the other phase conductors.
  • the shielding electrode 7 is included at the foot 1a of each supporting insulator 1.
  • the sliding bolt 2c includes a cylindrical part 2e and two ends 2d in the shape of truncated conical sections.
  • the slide bearing block 2a includes an end face 2f at each end of the slide bearing block.
  • the truncated conical section ends 2d facilitate mounting of the sliding bolt 2c.
  • the sliding bolt 2c includes two annular grooves 2g.
  • Each annular groove 2g accommodates a locking washer 6.
  • the locking washers 6 are separated from each other by a distance equal to the distance separating the end faces 2f of the slide bearing block 2a.
  • the locking washers 6 cooperate with the end faces 2f to prevent relative movement between the sliding bolt 2c and the slide bearing block 2a in the axial direction.
  • a gas pipe cable according to the present invention includes a gas pipe cable section 5 having ends 5a.
  • a thermal expansion compensator 13 associated with phase conductor 4a is included between ends of phase conductor sections 4a 1 and 4a 2 .
  • a thermal expansion compensator 13 is included between ends of phase conductor sections 4b 1 and 4b 2 of phase conductor 4b, and between ends of phase conductor sections 4c 1 and 4c 2 of phase conductor 4c (not illustrated).
  • Slide bearings 2j located at each end 5a of the gas pipe cable section 5 are locked by locking washers 6 as illustrated in FIG. 2b. Consequently, linear thermal expansion of the phase conductors located between the two ends 5a may take place only in the direction of the compensators 13, which absorb such expansions.
  • the slide bearings 2 located between locked slide bearings 2j are not locked.
  • FIG. 3b a cross-sectional view of the gas pipe cable section 5 of FIG. 3a is illustrated.
  • the phase conductors 4a, 4b, 4c are each supported by two supporting insulators 1.
  • the supporting insulators 1 are arranged in the enclosing pipe 3 such that the longitudinal axis of each supporting insulator substantially corresponds to that of another supporting insulator. So arranged, the longitudinal axis of each supporting insulator substantially passes through the longitudinal axis of two phase conductors.

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  • Installation Of Bus-Bars (AREA)
US06/152,148 1979-07-05 1980-05-21 Gas pipe cable Expired - Lifetime US4297523A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6277/79 1979-07-05
CH627779 1979-07-05

Publications (1)

Publication Number Publication Date
US4297523A true US4297523A (en) 1981-10-27

Family

ID=4307014

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/152,148 Expired - Lifetime US4297523A (en) 1979-07-05 1980-05-21 Gas pipe cable

Country Status (4)

Country Link
US (1) US4297523A (de)
BR (1) BR8004149A (de)
CA (1) CA1138945A (de)
DE (1) DE2931790A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5496965A (en) * 1993-09-27 1996-03-05 Gec Alsthom T & D Sa Line for conveying electrical power
EP1258964A2 (de) * 2001-05-16 2002-11-20 Siemens Aktiengesellschaft Säulenförmiger Stützer zur Abstützung eines Hochspannung führenden Leiters
US20110114351A1 (en) * 2008-06-30 2011-05-19 Siemens Aktiengesellschaft Tubular conductor arrangement comprising a fluid-tight enclosure tube
DE102017220050A1 (de) * 2017-11-10 2019-05-16 Siemens Aktiengesellschaft Phasenleiter sowie Verfahren zum räumlichen Fixieren eines Armaturkörpers an einem Phasenleitergrundkörper

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4403772A1 (de) * 1994-02-01 1995-08-03 Siemens Ag Druckgasisolierte Rohrstromschiene
DE19517591C2 (de) * 1995-05-08 1997-03-27 Siemens Ag Säulenförmiger Stützer zur Abstützung eines Hochspannungsleiters

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2306527A (en) * 1940-05-02 1942-12-29 Chase Brass & Copper Co Electric-power transmission system
US3919456A (en) * 1973-11-14 1975-11-11 Bbc Brown Boveri & Cie Tube enclosed pressure gas insulated electrical cable
DE2801505A1 (de) * 1978-01-12 1979-07-19 Siemens Ag Druckgasisolierte hochspannungsleitung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396131A (en) * 1942-10-16 1946-03-05 Ite Circuit Breaker Ltd Bus bar support
US2548566A (en) * 1949-09-14 1951-04-10 Stafford James Walter Isolated phase bus structure
GB731623A (en) * 1952-10-27 1955-06-08 Vickers Electrical Co Ltd Improvements relating to the mounting of electric busbars and the like
AT217533B (de) * 1960-09-27 1961-10-10 Bbc Ag Oesterr Tragkonstruktion für Stromschienen
DE1194026B (de) * 1960-09-30 1965-06-03 Siemens Ag Stromleiter-Lager
US3440371A (en) * 1967-03-10 1969-04-22 Gen Electric Jackscrew type racking mechanism for drawout switchgear
CH524907A (de) * 1970-12-03 1972-06-30 Bbc Brown Boveri & Cie Dreiphasige Hochspannungsleitungsanordnung mit Rohrkapselung
DE2157101C2 (de) * 1971-11-12 1982-04-29 Siemens AG, 1000 Berlin und 8000 München Abstützung eines in der Achse der Metallkapselung einer druckgasisolierten Hochspannungsschaltanlage verlaufenden Hochspannungsleiters mittels Isolatoren
DE2330282C2 (de) * 1973-06-12 1982-05-06 Siemens AG, 1000 Berlin und 8000 München Anordnung zur Längsverschiebung von mindestens einem Hochspannungsleiter in bezug auf die Kapselung einer gasisolierten Hochspannungsleitung
CH567326A5 (de) * 1973-11-28 1975-09-30 Bbc Brown Boveri & Cie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2306527A (en) * 1940-05-02 1942-12-29 Chase Brass & Copper Co Electric-power transmission system
US3919456A (en) * 1973-11-14 1975-11-11 Bbc Brown Boveri & Cie Tube enclosed pressure gas insulated electrical cable
DE2801505A1 (de) * 1978-01-12 1979-07-19 Siemens Ag Druckgasisolierte hochspannungsleitung
US4251681A (en) * 1978-01-12 1981-02-17 Siemens Aktiengesellschaft Compressed gas insulated high voltage line

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5496965A (en) * 1993-09-27 1996-03-05 Gec Alsthom T & D Sa Line for conveying electrical power
EP1258964A2 (de) * 2001-05-16 2002-11-20 Siemens Aktiengesellschaft Säulenförmiger Stützer zur Abstützung eines Hochspannung führenden Leiters
DE10125300A1 (de) * 2001-05-16 2002-11-21 Siemens Ag Säulenförmiger Stützer zur Abstützung eines Hochspannung führenden Leiters
EP1258964A3 (de) * 2001-05-16 2003-03-19 Siemens Aktiengesellschaft Säulenförmiger Stützer zur Abstützung eines Hochspannung führenden Leiters
US20110114351A1 (en) * 2008-06-30 2011-05-19 Siemens Aktiengesellschaft Tubular conductor arrangement comprising a fluid-tight enclosure tube
DE102017220050A1 (de) * 2017-11-10 2019-05-16 Siemens Aktiengesellschaft Phasenleiter sowie Verfahren zum räumlichen Fixieren eines Armaturkörpers an einem Phasenleitergrundkörper

Also Published As

Publication number Publication date
BR8004149A (pt) 1981-01-21
CA1138945A (en) 1983-01-04
DE2931790A1 (de) 1981-01-15

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Date Code Title Description
AS Assignment

Owner name: BBC BROWN, BOVERI & COMPANY, LIMITED, CH-5401 BADE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:FLOESSEL CARL D.;FLOESSEL KLAUS;REEL/FRAME:003852/0714

Effective date: 19800508

STCF Information on status: patent grant

Free format text: PATENTED CASE